#!/bin/bash
# docker下载地址：https://download.docker.com/linux/static/stable/x86_64/
# docker-compose下载地址：https://github.com/docker/compose/tags

set -e

if [ "$(id -u)" != "0" ]; then
	echo "this script must be run as root" 1>&2
	exit 1
fi

SELINUX=$(getenforce)
if [[ $SELINUX == "Enforcing" ]]; then
	echo "Please disable selinux"
	exit 1
fi

if [[ $# != 1 ]]; then
	echo "Usage: install-docker.sh docker.tgz"
	exit 1
fi

echo "Unarchiving docker..."
tar -xzf ${1}

echo "Installing docker..."
cp docker/* /usr/bin/
cat <<-EOF > /usr/lib/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
MountFlags=slave

[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload

echo "Starting docker..."
systemctl enable docker
systemctl start docker

echo "Update docker group"
groupadd docker
usermod -aG docker $USER

echo "Successfully"
